MIREL VZ1, Maintenance And Diagnostics Manual, Page: 19 / 33

154VZ1 : 190111
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6.3 D3 – Functional Test
Purpose:
This test verifies the basic functionality and integrity of the operated system. It also verifies
interaction with track infrastructure, the odometer system and the locomotive brake system
and verifies the functionality of the operator interface.
Execution:
The train protection system operator's trained personnel or other demonstrably authorised
and trained persons
Schedule:
The test is performed regularly at 6-month intervals with a tolerance of 1 month. Execution
of the D4 prophylactic control is a substitute for the D3 functional test.
The six-month term re-starts if an unplanned D3 functional test is executed.
The first deadline for conducting a D3 functional test commences on the date on which the
system is commissioned on the locomotive.
Description:
The functional test serves to ensure proper operation of all basic functions of the train pro-
tection system. The functional test comprises 3 sections:
A. Preparation and basic functionality
B. Functionality of defined parameters
C. Diagnostic TEST regime
The special diagnostic TEST regime is used by the train protection system to perform Sec-
tion C of the functional test. This regime is selected in the cab by pressing the button and
engaging the control switch. The locomotive must be completed stopped and the system
must be in ZAV regime or in a state where D1 self-diagnostics are not under way. Press
to complete a step and move to the next in Section C. Press to return to the previous
step. Press to activate the given system output in the current step. Switch off the control
switch to terminate the TEST regime.
Analogue input parameters (speed and pressure in the main pipe) are controlled with the
system in ZAV regime or in a state where D1 self-diagnostics are not under way. Pressing
and simultaneously shows the speed of the locomotive with precision of 1 km.h
-1
on
the NO11 display, while pressing and simultaneously displays the pressure in the
main brake pipe with accuracy of 0.1 bar on the NO11 display. MIREL VZT test equipment is
required to conduct the full scope of the D3 functional test.
Document 206VZ1 has the methodology and template protocol for conducting the D3 func-
tional test on the MIREL VZ1 train protection system.
Completion protocol:
The completion protocol for the functional test must contain the following details:
§ Date and site
§ Serial number of the system and the central unit
§
The number of the locomotive on which the equipment is installed
§ The signature of the person who conducted the test
§ The result of the functional test (no faults / with faults)